chore: bump actions, reflow configs, fix examples

Bump codecov/codecov-action to v7 and docker/metadata-action
to v6 in the CI and release workflows.

Reflow .golangci.yml and html_styles.css under
the prettier plugin dprint now loads.

Exporter examples hand their export to the temp-dir helper instead of
pairing defer cleanup with log.Fatal. log.Fatal exits the process, so
the deferred cleanup never ran and a failed export left its temp dir
behind. gocritic reported it as exitAfterDefer.

.github/workflows/ci.yml

@@ -286,7 +286,7 @@ jobs:
           } >> "$GITHUB_STEP_SUMMARY"
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v7
         with:
           files: ./coverage/coverage.out
           flags: Go ${{ env.GO_VERSION }}
@@ -401,7 +401,7 @@ jobs:
 
       - name: Extract metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: |
             ${{ env.IMAGE_NAME }}

.github/workflows/release.yml

@@ -111,7 +111,7 @@ jobs:
 
       - name: Extract metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: |
             ${{ env.IMAGE_NAME }}

.golangci.yml

@@ -346,7 +346,8 @@ linters:
 
     # stylecheck settings
     staticcheck:
-      checks: [
+      checks:
+        [
           "all",
           "-ST1000",
           "-ST1003",

internal/exporters/example_test.go

@@ -12,15 +12,19 @@ import (
 	"github.com/kjanat/articulate-parser/internal/services"
 )
 
-// tempOutput returns a path inside a fresh temp dir plus a cleanup func, so
-// example exports don't pollute the package source tree. Example functions
-// can't take *testing.T, so t.TempDir is unavailable here.
-func tempOutput(name string) (path string, cleanup func()) {
+// exportToTemp runs export against a path in a fresh temp dir and removes the
+// dir afterwards. Example functions can't take *testing.T, so t.TempDir is
+// unavailable here.
+func exportToTemp(name string, export func(path string) error) {
 	dir, err := os.MkdirTemp("", "exporters-example-*")
 	if err != nil {
 		log.Fatal(err)
 	}
-	return filepath.Join(dir, name), func() { _ = os.RemoveAll(dir) }
+	err = export(filepath.Join(dir, name))
+	_ = os.RemoveAll(dir)
+	if err != nil {
+		log.Fatal(err)
+	}
 }
 
 // ExampleNewFactory demonstrates creating an exporter factory.
@@ -82,12 +86,9 @@ func ExampleMarkdownExporter_Export() {
 	}
 
 	// Export to markdown file
-	out, cleanup := tempOutput("output.md")
-	defer cleanup()
-	err := exporter.Export(course, out)
-	if err != nil {
-		log.Fatal(err)
-	}
+	exportToTemp("output.md", func(path string) error {
+		return exporter.Export(course, path)
+	})
 
 	fmt.Println("Export complete")
 	// Output: Export complete
@@ -106,12 +107,9 @@ func ExampleDocxExporter_Export() {
 	}
 
 	// Export to Word document
-	out, cleanup := tempOutput("output.docx")
-	defer cleanup()
-	err := exporter.Export(course, out)
-	if err != nil {
-		log.Fatal(err)
-	}
+	exportToTemp("output.docx", func(path string) error {
+		return exporter.Export(course, path)
+	})
 
 	fmt.Println("DOCX export complete")
 	// Output: DOCX export complete
@@ -138,12 +136,9 @@ func ExampleHTMLExporter_Export() {
 	}
 
 	// Export to HTML file
-	out, cleanup := tempOutput("output.html")
-	defer cleanup()
-	err := exporter.Export(course, out)
-	if err != nil {
-		log.Fatal(err)
-	}
+	exportToTemp("output.html", func(path string) error {
+		return exporter.Export(course, path)
+	})
 
 	fmt.Println("HTML export complete")
 	// Output: HTML export complete

internal/exporters/html_styles.css

@@ -1,13 +1,7 @@
 body {
   font-family:
-		-apple-system,
-		BlinkMacSystemFont,
-		"Segoe UI",
-		Roboto,
-		Oxygen,
-		Ubuntu,
-		Cantarell,
-		sans-serif;
+    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
+    Cantarell, sans-serif;
   line-height: 1.6;
   color: #333;
   max-width: 800px;